On my '84 the spring was eating into the foam causing the seat to list as you describe. I removed the seat, removed the cover and foam and strapped a section of carpet remnant, cut to fit, over the top of the spring fastening it with wire from underneath. The theory here is the piece of carpet spreads the load and keeps the spring from cutting into the foam. I also "screwed" a piece of pool noodle foam into the front coils of the springs to firm them up. Worked great. Nice firm seat, very cheap and holding up well after 1 year. RT

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